I find it funny my bones/joints make cracking/clicking sounds very easily, I.E if I so something small like lift my arms my joints click, it doesn't hurt but I was wondering why it happens. My younger brother finds it funny and amusing but I don't know if I should be concerned..

There is no reason to be concerned.
The reason for your joints clicking is simple science of the body.
When u move in a certain way and your body stretches, your bones, or joints click due to a build up of nitrogen gas bubbles.